It's all propaganda. Every war is based on this non-aggression principle and is a defensive war, offensive wars are long gone. If those in power want to fight a war on another country's soil, they simply invent a group of people they "need" to protect there, demonize the enemy and go to war there. Like Russia was "defending" russians in Georgia.

That's why I go by my own definition of defensive war, and not the government's ;)

And it's one more reason not to comply with conscription and sabotaging this authoritarian practice.

You should also recognize, that as long as other states use this authoritarian practice, every state would have to use a similar practice to protect the order it imposes on people from other states.

So, yeah, opposing a state is always a good idea. States are not your friends.

> but a defensive war is always justified

Really? If a foreign power intervened in, say, ethnic cleansing, defense would be justified?

Ethnic cleansing by itself violates the non-aggression principle, but nice try.